5. (10 points) Consider the optimal simplex tableau for the Reddy Mikks model, presented below. Here x1 and x2 are the decision variables, and s3 and s4 are the slack variables for the third and fourth problem constraints, respectively. (a). Identify the optimal inverse matrix. (b). Show that the right-hand side of the optimal tableau (i.e., the column vector of optimal values of x1,x2,s3, and s4 ) is equal to this inverse matrix multiplied by the original right-hand side column vector of the original problem constraints